Testing 3.0 fixes

-general cleanup

PX4 Flight Mode: Fix label coloring

Was too hard to click

width/height must be specified by user name

Recognize joystick hats and append to the button list (rev 2)

Fix bitmask editing

Allow disable of uncalibrated joystick

Single map type setting for all maps

- Offline maps new set defaults to default map type
- Plan/Fly views use MapScale control

Update README.md

Minor README tweaks. [ci skip]

Making tile cache description not mandatory.

Sensors small screen

Offline map small screen

Fix icons for iOS.

Restoring link change signal.

Camera: Small screen fixes